"Iradah, the will to find God, is the beginning of the path of spiritual travelers, the first title given to those who are determined to reach God Most High. This attribute is only called iradah because will is the preface to every undertaking. When the servant does not will, he does not carry out."  ―Al-Qushayri, Al-Risalah: Principles of Sufism

"Know that the foundation and rationale of struggle or striving (mujahadah) is to wean the ego from what is familiar to it and to induce it to oppose its desires (passions) at all times." ―Al-Qushayri, Al-Risalah: Principles of Sufism

In order to arrive at genuine spiritual attainment and knowledge of divinity, the sincere practitioner of any religion must engage in and maintain an esoteric discipline (riyadah). This is accomplished through the development and application of conscious, unconditioned will. Through submission and obedience to divine ordinances and by striving against the lower passions, conditioned elements, and egotistical drives of the mind, one thereby, based on the law of cause and effect, learns authentic spiritual and psychological conduct, the basis of true spiritual life.

Resources and References:

https://chicagognosis.org/lectures/spiritual-discipline