The human mind moves always forward, alters its viewpoint and enlarges its thought substance, and the effect of these changes is to render past systems of thinking obsolete or, when they are preserved, to extend, to modify and subtly or visibly to alter their value.

In order to explain why the ordinary Sadhus and Yogis take to tobacco and gānja [an intoxicant], I said that these cause stimulation of the physical brain. But these have reactions. And to stimulate the brain thus is not the proper process.

An aimless life is always a troubled life. Every individual should have an aim. But do not forget that the quality of your aim will depend the quality of your life. Your aim should be high and wide, generous and disinterested; this will make your life precious to yourself and to others. Whatever your ideal, it cannot be perfectly realized unless you have realized perfection in yourself.

There is nothing small in God's eyes; let there be nothing small in thine

Be conscious first of thyself within, then think and act. All living thought is a world in preparation; all real act is a thought manifested. The material world exists because an idea began to play in divine self–consciousness.

The practice of Yoga brings us face to face with the extraordinary complexity of our own being.

Evolution is not finished; reason is not the last word nor the reasoning animal the supreme figure of Nature. As man emerged out of the animal, so out of man the superman emerges.