Matthew 7:13-14 is a principle. The "few" are those whom the Father predestined to salvation before the foundation of the world. A classic example/answer to the title of this thread.
To God Be The Glory
You need to study more, and not a commentary if you really want to give glory to God.
Its like this..
"many are called , few are chosen".
What does that mean?
Well, in Light of the Cross and in reference to John 3:16...
= It simply means the same as this context... "by one man's disobedience many were made sinners, and by one Man's obedience, many were made righteous".
But notice.....by Adam's disobedience the entire human race is made "sinners".....so, that "many" means ALL.
And ..
By Jesus's blood, death, and resurrection, as the Gospel BELIEVED, "" many are made righteous".
So, the "many"< is everyone who will "call on the Name of the Lord, and be SAVED". as they are made righteous.
Now apply this context to... "many are called but few are chosen"..
1.) Called - = Given the Gospel, and the opportunity to be SAVED....who is the MANY? The Many is the entire WORLD.... John 3:16
And who are chosen?
2.) Chosen? The chosen are those who are "justified by faith". They are the FEW.... The FEW, is in relation to the entire world's population.
So, out of all the humans ever born since the Cross was raised there are some who have been born again, .. and these are the "few", as compared to the "many" who died as a Christ rejector, since the Cross was raised.