How does one get stronger? Exercise of course! See what the scripture says about what we should exercise:
"But refuse profane and old wives' fables, and exercise thyself rather unto godliness. For bodily exercise profiteth little: but godliness is profitable unto all things, having promise of the life that now is, and of that which is to come." (1 Timothy 4:7-8)
Simply a Christian. "Be imitators of me, as I am of Christ." (1 Corinthians 11:1) "Therefore encourage one another and build one another up, just as you are doing." (1 Thessalonians 5:11)