We would teach children a chorus that said "Jesus-said-that-who-so-ever-will-may-come!" to which a few of us added in a late night discussion, and "Calvin-said-that-who-so-ever-won't."
At that stage I had not read a single word that Calvin had written, but that didn't stop me from having a grotesquely misshapen view of the man and his theology. It was a few years later, when reading through Ephesians 2:1-10, that my misinterpretation of Calvinism was exposed, and my inadequate grasp of the grace of God in the gospel was laid aside. I then saw, for the first time, that the Triune God saves, he really does do the work of saving, and that the offer of the gospel to all is made effective to those who are called. I saw that I was dead, but God made me alive with Christ even when I was dead in sin.
That is why today I am both a Calvinist, for want of a better phrase (I believe that the sovereign God graciously saves undeserving sinners) and an evangelist who is free to tell all people everywhere to repent and believe.
And Calvin, as the following makes clear, really did believe and teach that "who-so-ever-will-may-come":
The Gospel is indeed offered to all for their salvation, but its power is not universally manifest.Commentary on Romans, 1:16, p. 27
The fact that the Gospel is the taste of death to the ungodly arises not so much from from the nature of the Gospel itself, as from their own wickedness. By setting forth one way of salvation, it cuts off confidence in every other way. When men withdraw from this one salvation they find in the Gospel a sure evidence of their own ruin.
When, therefore, the Gospel invites all to partake of salvation without any difference, it is rightly termed the doctrine of salvation. For Christ is there offered, whose proper office is to save that which had been lost, and those who refuse to be saved by Him shall find Him their Judge.