The Lord, who is the controller of all energies, thus creates, by His own potency, eternal time, the fate of all living entities, and their particular nature, for which they were created, and He again merges them independently.
The creation of the material world, wherein the conditioned souls are allowed to act subordinately by the Supreme Lord, takes place again and again after being repeatedly annihilated. The material creation is something like a cloud in the unlimited sky. The real sky is the spiritual sky, eternally filled with the rays of the brahmajyoti, and a portion of this unlimited sky is covered by the mahat-tattva cloud of the material creation, in which the conditioned souls, who want to lord it against the will of the Lord, are put into play as they desire under the control of the Lord by the agency of His external energy. As the rainy season appears and disappears regularly, the creation takes place and is again annihilated under the control of the Lord, as confirmed in the Bhagavad-gītā (8.19). So the creation and annihilation of the material worlds is a regular action of the Lord just to allow the conditioned souls to play as they like and thereby create their own fate of being differently created again in terms of their independent desires at the time of annihilation.
(Srimad Bhagavatam----2:5:21----translation and purport).

A naturalist can see the general course of material nature simply by studying a piece of fruit. A small fruit develops from a flower, grows, stays for some time on a branch, becomes full-grown, ripens, then begins to dwindle daily until it finally falls from the tree and commences to decompose into the earth and at last mingles with the earth, leaving behind its seed which in its turn grows to become a tree and produces many fruits in time, which will all meet the same fate, and so on and so on.
Similarly, a living being (as a spiritual spark, a part of the Supreme Being) takes its organic form in the womb of a mother just after sexual intercourse. It grows little by little within the womb, is born, then continues growing, becomes a child, boy, youth, adult, old man, then finally dwindles and meets death, despite all the good wishes and hopeful pipe dreams of fiction writers. By comparison, there is no difference between man and the fruit. Like the fruit, the man may leave behind him his seeds of numerous children, but he cannot exist eternally within his material body due to the law of material nature.
(Easy journey to other planets).

Others cannot change their fate, but only the devotees can change. How? Kṛṣṇa says, ahaṁ tvāṁ sarva-pāpebhyo mokṣayiṣyāmi (BG 18.66). Kṛṣṇa says, "I shall give you protection from all the resultant action of your sinful life." That is fate changed.
(Lecture on Srimad Bhagavatam---5:5:1).

The law of nature is so subtle that every part of our body is influenced by the respective stars, and a living being obtains his working body to fulfill his terms of imprisonment by the manipulation of such astronomical influence. A man's destiny is therefore ascertained by the birthtime constellation of stars, and a factual horoscope is made by a learned astrologer.
(Srimad Bhagavatam----1:12:12---purport).

Because of destiny, the touch sensation, the interactions of air, and the situation of the mind, which is produced of the ethereal element, one receives a body according to his previous activities. Needless to say, a living entity transmigrates from one form to another. His form changes according to destiny and by the arrangement of a superior authority which controls the interaction of air and the mental situation. Form is the combination of different types of sense perception. Predestined activities are the plans of the mental situation and the interaction of air.
(Srimad Bhagavatam----3:26:38---purport).

According to one's destiny, one enjoys allotted happiness and distress, even though one keeps himself in one place.
(Srimad Bhagavatam----5:5:32---purport).

One should be satisfied with whatever he achieves by his previous destiny, for discontent can never bring happiness. A person who is not self-controlled will not be happy even with possessing the three worlds.
(Srimad Bhagavatam----8:19:24---translation).

Material existence causes discontent in regard to fulfilling one's lusty desires and achieving more and more money. This is the cause for the continuation of material life, which is full of repeated birth and death. But one who is satisfied by that which is obtained by destiny is fit for liberation from this material existence.
(Srimad Bhagavatam----8:19:25---translation).

When a fire, for some unseen reason, leaps over one piece of wood and sets fire to the next, the reason is destiny. Similarly, when a living being accepts one kind of body and leaves aside another, there is no other reason than unseen destiny.
(Srimad Bhagavatam----10:1:51---translation).

The work of unseen destiny cannot be ascertained by practical experimental knowledge, and therefore one must be satisfied by reasoning that everything is done by supreme providence.
(Srimad Bhagavatam----10:1:51---purport).

Every man is certainly controlled by destiny, which determines the results of one's fruitive activities. In other words, one has a son or daughter because of unseen destiny, and when the son or daughter is no longer present, this also is due to unseen destiny. Destiny is the ultimate controller of everyone. One who knows this is never bewildered.
(Srimad Bhagavatam----10:5:30---translation).

The workings of that energy are difficult to comprehend, but it is understood from Vedic literature that the conditioned soul creates his own destiny and is offered a particular body by the laws of nature under the superintendence of the Supreme Personality of Godhead, who always accompanies him as Paramātmā.
(Srimad Bhagavatam----3:20:12---purport).

Everyone is suffering and enjoying the result of his own destiny. This destiny is made by the living beings in course of social intercourse.
(Srimad Bhagavatam----1:8:28---purport).

In this world we are, every one of us are bound up by the laws of karma, destiny. We have got our destiny. So much happiness, so much distress we must have.
(Lecture on Bhagavad-Gita---2:11).

Yamarāja, the great controller of life after death, decides the living entities' destinies in their next lives. He is surely among the most confidential representatives of the Lord. Such confidential posts are offered to great devotees of the Lord who are as good as His eternal associates in the spiritual sky.
(Srimad Bhagavatam----3:5:21---purport).

One may be in one position or another according to destiny, but in any case one must continue to hear about the activities and pastimes of the Supreme Lord, regardless of circumstances. A pure devotee does not pray for liberation or for cessation of the cycle of birth and death because he does not consider that important. The most important thing for a devotee is getting a chance to hear about the pastimes and glories of the Lord.
(Srimad Bhagavatam----4:30:33---purport).

One should be satisfied with whatever he achieves by his previous destiny, for discontent can never bring happiness.
(Srimad Bhagavatam----8:19:24---purport).

The Supreme Personality gives directions as to what is good and what is bad, and one simply has to act in Kṛṣṇa consciousness to attain the perfection of life. No one can ascertain his destiny as the Supreme Lord can; therefore the best course is to take direction from the Supreme Lord and act.
(Bhagavad-Gita----18:59---purport).

Destiny is extremely strong, but one can change destiny if one comes to the platform of Kṛṣṇa consciousness. Karmāṇi nirdahati kintu ca bhakti-bhājām (Bs. 5.54).
(Srimad Bhagavatam----9:9:33--translation).

You are doing work, you are acting, and that is being supervised by the superior authorities. And you get a type of body that this living entity has worked in this way, he should get this type of body. Therefore, it is predestined. Karmaṇā daiva-netreṇa. Prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśaḥ. That is being automatically done because a materialistic person is associating with different types of the modes of material nature. So he is forming a certain type of body, sattvic, rajasic, tamasic. Therefore, it is predestined. But karmāṇi nirdahati kintu ca bhakti-bhājām, those who are engaged in devotional service, they are not under karma. Their destiny is being prepared by Kṛṣṇa. Even though they are supposed to be doing ordinary work, but because he has surrendered to Kṛṣṇa, his destiny is being manufactured by Kṛṣṇa Himself, not by this material nature. He is not under these material laws.
(Lecture on Srimad Bhagavatam---7:7:30-31).