Do we have a responsibility to tell others about salvation in Jesus Christ? Read what God tells Ezekiel in the book of Ezekiel 3:17-21:
Son of man, I have made thee a watchman unto the house of Israel: therefore hear the word at my mouth, and give them warning from me.
When I say unto the wicked, Thou shalt surely die; and thou givest him not warning, nor speakest to warn the wicked from his wicked way, to save his life; the same wicked man shall die in his iniquity; but his blood will I require at thine hand.
Yet if thou warn the wicked, and he turn not from his wickedness, nor from his wicked way, he shall die in his iniquity; but thou hast delivered thy soul.
Again, When a righteous man doth turn from his righteousness, and commit iniquity, and I lay a stumbling block before him, he shall die: because thou hast not given him warning, he shall die in his sin, and his righteousness which he hath done shall not be remembered; but his blood will I require at thine hand.
Nevertheless if thou warn the righteous man, that the righteous sin not, and he doth not sin, he shall surely live, because he is warned; also thou hast delivered thy soul.
And a few verses from the New Testament concerning salvation.
That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. Romans 10:9
Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost; Titus 3:5
For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast. Ephesians 2:8-9
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. John 14:6
Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved. Acts 4:12
Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven. Matthew 7:21
What are we to do tell others about what He has done for you! Be a daily walking and talking witness for Jesus Christ! Being a Christian is not being religious, but a lifestyle! Your daily testimony is very important!
Learn it! Love it! Live it!