1 John 4

1 John 4:4
You, dear children, are from God and have overcome them, because the one who is in you is greater than the one who is in the world.

I have no need to fear as God is on my side and has given me the Holy Spirit to dwell in me. The Spirit will be my counsellor and protector against the things of the world.

1 John 4:7-11
Dear friends, let us love one another, for love comes from God. Everyone who loves has been born of God and knows God. Whoever does not love does not know God, because God is love. This is how God showed his love among us: He sent his one and only Son into the world that we might live through him. This is love: not that we loved God, but that he loved us and sent his Son as an atoning sacrifice for our sins. Dear friends, since God so loved us, we also ought to love one another.

God loves us so much that He was willing to send his son into this world as a lowly human being so that he can walk among us and teach us what it means to be under His wing of grace, mercy, forgiveness, and love. Is it possible for us to develop that same sacrificial love for others? Probably... but we need to have that desire to have the same heart as Jesus in order to grow and mature in faith.

1 John 4:13
We know that we live in him and he in us, because he has given us his Spirit. 

There's a reason why the indwelling of the Spirit in us is always repeated throughout the New Testament, let alone this book. We always forget how important and significant it is that a part of God is residing in us.

1 John 4:18-21
There is no fear in love. But perfect love drives out fear, because fear has to do with punishment. The one who fears is not made perfect in love. We love because he first loved us. If anyone says, "I love God," yet hates his brother, he is a liar. For anyone who does not love his brother, whom he has seen, cannot love God, whom he has not seen. And he has given us this command: Whoever loves God must also love his brother. 

Nothing can stand against because God is always for us. There is nothing to fear because God will do away with things that are corrupt and evil. There is nothing to fear of God Himself because He is good and loving and gracious. The definition of faith is trusting and believing in something that hasn't happened or is something that can't be seen. Like the verse says if we love God, someone who's so great that we will never be able to see Him in this lifetime, then we should be able to love all the people around us as well.