Some of the most popular phrases to include in an encouraging poem are also some of the simplest, such as "Give it a try" or "Go for it." Other popular words of encouragement include "Why not?" and "It's worth a shot."
There are many popular phrases that are quotes from famous pieces, such as “The only person you are destined to become is the person you decide to be,” from Ralph Waldo Emerson. Another encouraging Emerson quote is "Big jobs usually go to the men who prove their ability to outgrow small ones," which can inspire others to become more ambitious in their desires.