He becomes the master of the lower by enlisting in the service of the higher.

Man repeats the same thoughts, the same actions, the same experiences over and over again, until they are incorporated with his being, until they are built into his character as part of himself. Evolution is mental accumulation. Man to-day is the result of millions of repetitious thoughts and acts. He is not ready-made, he becomes, and is still becoming. His character is pre-determined by his own choice. The thought, the act, which he chooses, that, by habit, he becomes.

Thus each man is an accumulation of thoughts and deeds. The characteristics which he manifests instinctively and without effort are lines of thought and action become, by long repetition, automatic ; for it is the nature of habit to become, at last, unconscious, to repeat, as it were, itself without any apparent choice or effort on the part of its possessor ; and in due time it takes such complete possession of the individual as to appear to render his will powerless to counteract it.

Habit is repetition. Faculty is fixed habit.
『ジェームズ・アレン365日 毎日の瞑想(原題:James Allen’s book of meditations for Every Day in the Year)』より
ジェームズ・アレン(James Allen, 1864-1912)
翻訳公開日 2021年6月9日