Remember when the youths took refuge in the cave and they said: "Our Lord! You grant us from Your Mercy and inspire for us the upright way".
When the community including the family and friends became heedless by rejecting Lord’s Message, a few youth men abstained the path of the society and strived with their True belief. But when the disbelieving community summoned them all for questioning about their way of life and forced to accept their strayed forefather’s way of life, each of the youth prayed by the soul as told in this verse. Then Lord Allah sent a dog to them that is not begotten. Thus Lord led them into the cave by that dog. Thus Lord testified that He will save the believers as explained in verse 10: 103.
Today, as there is no group of believers anywhere in the world, the odd believer should lead a life as explained in verses 7: 205-206. See explanation 2: 256; 3: 79-80 and 4: 159.