question #2 Sahih al-Bukhari 7498, Book 97, Hadith 123 : How does the concept of unseen rewards motivate believers to strive for righteousness?

the Prophet (ﷺ) said, “Allah said, “I have prepared for My righteous slaves (such excellent things) as no
eye has ever seen, nor an ear has ever heard nor a human heart can ever think of.’ ”