1.  Because God has commanded us to do so.  The final words of Jesus while on earth (Acts 1:8 But you shall receive power, after that the Holy Ghost is come upon you: and you shall be witnesses unto me both in Jerusalem, and in Judea, and in Samaria, annd ynto the uttermost part of the earth.) and also the Bible (Rev. 22:17  And the Spirit and the b ride say, Come.  And let him take the water of life freely.)  speak concerning this.

 

2.  Because it demonstrates our love for God.  Christ said that if we truly loved Him we aould keep His commandments (John 14:15 If you  love me, keep my commandments).

 

3.  Because all are lost (Rom. 3:10, 23  As it is written, There is none righteous, no, not one:  For all have sinned and come short of the glory of God;).

 

4. Because our sharing is God's chosen method to tell all people.  He could have used angels, but He didn't.. Only redeemed sinners can tell lost sinners about Christ.  (Romans 10:14-17  How then shall they call on him in whom they have not believed? and how shall they hear without a preacher?  And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!  But they have not all obeyed the gospel.  For Esaias saith, Lord, who hath believed our report?  So then faith cometh by hearing, and hearing by the word of God.  Acts 8:3 As for Saul, he made havock of the church, entering into every house, and haling men and women commited them to prison.)

 

5. Because God desires to save all people (Acts 4:12  Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved. ; 2 Peter 3:9 The Lord is not slack concerning his promise, as some men count slackness; but is long suffering toward us, not willing that any should perish, but that all should come to repentance.  ; 1 Timothy 2:4 Who will have all men to be saved, and to come unto the knowledge of the truth).

 

6.  Because someone once shared his faith with us.  It may have been a faithful Bible teacher, or a godly pastor, or a praying parent.  In other words, they have a right to expect that we will do for others what they have done for us.