1 John 5:1-12

1 John 5:2
This is how we know that we love the children of God: by loving God and carrying out his commands. 

This is such a big part of our relationship with God. We need to love like how our Heavenly Father loves us, with no conditions and always forgiving. We also need to obey and follow Him, as hard as that is. Only through this challenge of becoming imitators of His Son Jesus will God transform us into a new being who is always one step closer to being holy and pure.

1 John 5:4
for everyone born of God overcomes the world. This is the victory that has overcome the world, even our faith. 

We have that strength, providence, and perseverance to overcome anything of the world that pulls us down and causes us to stumble because God walks with us. I always remind myself of this (and is true): God will never allow anything that you can't overcome for you to tackle. Every challenge and trial has a purpose, even if it is the work of Satan, God will use it for His glory by teaching you how to get over this stumbling block.

The coming of Jesus by water and blood symbolizes Jesus' baptism and the voice coming from heaven and Jesus as the atoning sacrifice on the cross respectively. Both of these along with the Spirit testify that Jesus is the Son of God.

1 John 5:11
And this is the testimony: God has given us eternal life, and this life is in his Son. 

New life through Jesus' resurrection as He overcame the grave that the world into which had forced him.