The highest manifestation of life consists in this: that a being governs its own actions.A thing which is always subject to the direction of another is somewhat of a dead thing.

The process of grouping, of organization, is not arbitrary but follows definite laws.

Sustainability isn't just about planting trees—it's about planting the right trees in the right places and ensuring they thrive for generations.

Psychology must be based on facts, not hypotheses.