1 Corinthians 8:3 KJV
But if any man love God, the same is known of him.
If a believer were to live with this one goal; to love God, the rest of the issues of life would care for themselves.
The chapter speaks of the one who think he knows but doesn't.
If he lived only to love God what he thought he knew would be trivial.
The chapter speaks of our liberty being another's stumbling block.
If he lived only to love God, that would be known of him and he would not as likely be a stumbling block.
The chapter speaks of sinning against the brethren (I know this sin is being a stumbling block but allow me to expand just a bit).
If he lived only to love God we would not so sin.
I do not mean that we live so people will know we love God. The flesh is so given to sin that that would quickly become its own evil goal; to have men know we love God even if we don't. The thing is to grow in love for God and let people see what they will.
If we really do love God, it will be known.