'Know the Lord' in the Bible

I will even betroth thee unto me in faithfulness: and thou shalt know the LORD.

Their actions do not allow themto return to their God,for a spirit of promiscuity is among them,and they do not know the Lord.

Then shall we know, if we follow on to know the LORD: his going forth is prepared as the morning; and he shall come unto us as the rain, as the latter and former rain unto the earth.