When one believes that Jesus Christ is the Only begotten Son of God, whom God sent for the redemption of all mankind, and accepts Him to be his/her Lord and Master, they are ‘Called’. The world brands (calls) them Christians, meaning belonging to Christ or Christ Ones, but what is a Christian called to?

A Christian is called OUT of and IN to.
A Christian is called OUT of darkness, doom and death IN to light (1 Peter 2:9), liberty (Galatians 5:13) and life (1 Timothy 6:12).

Points to ponder:
Are you still in darkness? Do you feel that you are under the pressures and bondage of this world? Are you afraid to die? If so, acknowledge your need for a Savior and believe in the Lord Jesus and He will call you out of darkness, doom and death into light, liberty and life.
And for those of us who profess to be Christians, let us fight the good fight of faith, laying hold onto eternal life, unto which we have been called! (1 Timothy 6:12).

1 Peter 2:9 (KJV)
9 But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light;

Galatians 5:13 (KJV)
13 For, brethren, ye have been called unto liberty; only use not liberty for an occasion to the flesh, but by love serve one another.

1 Timothy 6:12 (KJV)
12 Fight the good fight of faith, lay hold on eternal life, whereunto thou art also called, and hast professed a good profession before many witnesses.