The first one pairs with "People often choose to ignore uncomfortable truths." Evident can mean obvious. In this context, it's being used as an "obvious truth."
The second pairs with "Having a clear purpose can be very powerful." The speaker says their advantage is knowing what they want.
The third pairs with "People often resist change". The "great thinkers" opposed new ideas. New is associated with change.
The last pairs with "It's a challenge to be an individual". The text says it takes courage to do what we want, that it is the hardest thing. Doing what you want and straying from others is being individual.