btw, i got some question regarding about the bible

in matthew 7:13-14
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. But small is the gate and narrow the road that leads to life, and only a few find it. ........

how few is few? as we all know, at least 30%(well in my opinion there is more than 50%) of world population is a christian. so is 30% consider few?

the verses makes me wonder that only a certain percentage, maybe only 2 or 3% can only enter the kingdom of God....

I know we are to work on the salvation, but how do you know if what  you are doing is right? Even each christian has his own justification and judgement, some christian says bow down to idol for certain special occassion is ok, as long as you know your heart is right with God, where some say can not, some still go to pubs oftenly some do not etc...

This is also another issue that arouse many arguements among christians. If you are saying salvation is by grace and faith, then those strong faith who eats offered food is ok while to those who has little faith eating offered food is a sin, both parties also correct; if both parties also correct, just the matter how strong one's faith is, then why are there so many arguements?

mind asking....u RC?

Perhaps singing hymns without music. lol