3. So they will not depart from it!

Train up a child in the way he should go: and when he is old, he will not depart from it.

Proverbs 22:6

2. So it can proceed out of your children's mouths!  That they know how to act and have good success!

This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therin; for then thou shalt make thy way prosperous, and then thou shalt have good success.

Joshua 1:8

1.  Put it in your child's mind so it can be there for the Lord to bring to their remembrance.  Even when you can't be there!

But the Comforter which is the Holy Ghost, whom the father will send in my name, he will teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.  

John 14:26

Why should our children memorize the scriptures?