#essential

"Frustration, although quite painful at times, is a very positive and essential part of success."

"Try for once to justify the meaning of your existence as it were a posteriori by setting yourself an aim, a goal... an exalted and noble 'to this end.' Perish in pursuit of this and only this"

"If we can never possess the complete knowledge, then faith in the infinite potential must become an essential if not the necessary component of our path."

"Love is that condition in which the happiness of another person is essential to your own."

"Paint the essential character of things."

"Trust is the glue of life. It's the most essential ingredient in effective communication. It's the foundational principle that holds all relationships."

"Why should it be essential to love rarely in order to love much?"

"The assumption of an absolute determinism is the essential foundation of every scientific enquiry."