There are two kinds of calls from God. One is like that of the father to the son in Luke 15. When we sin and stray from God, He is always desirous of our return to Him, always calling for us to repent and accept His mercy. "He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy." (Proverbs 28:13)
The other calling is that which is unique to every Christian. What does God want of me in this life? Some are called as pastors, some evangelists, some prophets (see Romans 12, I Corinthians 12, Ephesians 4). My calling is written on the staff of this blog. Not only is this calling unique, but it can also change from time to time. That is entirely up to God and our sensitivity to His Spirit's voice.
At this point in life, my calling remains the same and was recently reinforced as I read the book of Jeremiah. In particular, this verse stood out:
"Therefore thus saith the LORD, If thou return, then will I bring thee again, and thou shalt stand before me: and if thou take forth the precious from the vile, thou shalt be as my mouth: let them return unto thee; but return not thou unto them." (Jeremiah 15:19)
It is a calling and a warning. I find the latter elsewhere in God's Word, "Love not the world, neither the things that are in the world. If any man love the world, the love of the Father is not in him. For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world. And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever." (I John 2:15-17)
Awake unto righteousness and sin not. Will Jesus find us this way at the moment of His return?