Incline your ear, and hear the words of the wise, and apply your heart to my knowledge, for it will be pleasant if you keep them within you, if all of them are ready on your lips.
This is a good passage encouraging the memorization of scripture, particularly of proverbs. It is good to have wisdom in our hearts and to keep it close on our lips. The best way that I know to accomplish this is to memorize it and through review keep it fresh within my thinking.
Scripture is immensely rewarding in this way. It does however require diligence. Scripture memory is the hardest part of biblical intake. But it also has the deepest power to change us. For that reason I see it not as an expenditure, but rather as an investment that yields much reward.
The net affect of such exposure is grace-filled thinking and action. Scripture memory should instill God's character in us if we dwell upon His Word. The promise here is a "pleasant" life when God's Word is ready on our lips! I take it to mean that Word saturated people are pleasant, gracious, and wise with the truth that God gives. That is the person I want to be. And knowing God's Word by heart will get me there.