What a man can be, he must be," Maslow wrote.

Maslow believed that as each level of need is met, we move on to the next higher level. If the most primary needs aren't met, we have to stay focused on fulfilling those needs.
If for example, you are constantly cold and hungry, you are unlikely to be concerned about whether you are intellectually stimulated. After the primary needs for survival are met, Maslow believed our next priority to be personal safety, followed by social interaction, and then self-worth, self-esteem, status, and recognition. Last, but not least, is the need for self-actualization, or self-fulfillment - the need to realize our full purpose and potential. "A musician must make music, an artist must paint, a poet must write, if he is to be ultimately at peace with himself. What a man can be, he must be," Maslow wrote.