'Known' in the Bible

I write unto you, fathers, because ye have known him that is from the beginning. I write unto you, young men, because ye have overcome the wicked one. I write unto you, little children, because ye have known the Father.

I have written unto you, fathers, because ye have known him that is from the beginning. I have written unto you, young men, because ye are strong, and the word of God abideth in you, and ye have overcome the wicked one.

Whosoever abideth in him sinneth not: whosoever sinneth hath not seen him, neither known him.

And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him.