What makes our faith in God strong are the words of God. They are the sustainable spirit because you are not brought up in believing the creator of heaven and earth, Maybe you were physical thing etc.
But be that as it may,if you are going to study facts and truth and everything around us,we will discover that there are spirits in our being, the bible tells us we have our body our spirit and our soul.it is truth that physicists do not realize. Physicists only believe in something special, but the bible tells us that there are spirits in our being there is a spirit that gives life to our flesh according to the lord jesus christ. a body without a spirit is dead like a faith without work is dead.
James 2 verse 26 says, For as a body without a spirit is dead so faith without work is dead also. The body separated from the spirit that God put into it is dead.
Meaning it is the spirit that gives life to the flesh, to our bodies. And the spirit that fortified the spirit are the words of God.
John 2 verse 3 says, it is the spirit that quickeneth, the flesh profiteth nothing, the words that I speak unto you, they are spirit, and they are life.
The lord jesus christ declared unto the Jews, the words that are speak unto you they are spirit and they are light. Words of God are spirit that gives life. So, if you are asking me how will your faith be strong and how can you pass them to your family and to your children? It is your obligation to learn the words of God. That why before someone is been batipzed they ask them to undergo indoctrination sessions wherein the words of God, the commandment, the prohibitions, and those things that are allowed are being taught to someone who is undergoing indoctrination. Through this indoctrination you will realize that we have words of God to follow and not too. It is the word of God which is the spirit, that contains the spirit that will fortalize or make our faith strong,because faith cometh from hearing.
Romans 10 verse 17 says, so then faith cometh by hearing and hearing by the word of God.