Effort within the mind further limits the mind, because effort implies struggle towards a goal and when you have a goal, a purpose, an end in view, you have placed a limit on the mind.
Bruce LeeTo develop the creative attitude, analyze and focus on the wanted SOLUTION; seek out and fill your mind with the FACTS; write down ideas, both sensible and seemingly wild; let the facts and ideas simmer in your mind; evaluate, recheck, settle on the creative ideas.
Bruce Lee