Of the five points of Calvinism (TULIP) I hold that Total Depravity, Unconditional Election, and Preservation of the Saints are Biblically based. Limited Atonement and Irresistible Grace are not.
Piper gives a compelling argument here:
http://www.desiringgod.org/seminars/tulip-2013-part-2
IMO, piper does his homework. He doesn’t pull any punches; he presents contrary opinions and then logically walks through why he believes what he does.
If you have the time to listen, I believe - if nothing else - that you will be blessed by hearing the word of God exposited by a man who loves God and loves the Word...
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Honest question from a Catholic.