Yet there is one instance where the phrase is as apt as can be. Sin is a “one size fits all” commodity. For we before laid charge both of Jews and Greeks, that they are all under sin…For all have sinned and fall short of the glory of God, Rom 3:9,23. And we do not get that sin from some mystical contagion. Therefore as through one man sin entered into the world, and death through sin, and so death passed unto all men for that all sinned, Rom 5:12. We are under the charge of sin, because we sin, every one of us, no matter how good we think we are.
And sin is sin is sin: For whoever shall keep the whole law, and yet stumble in one point, he is become guilty of all. For He who said, You shall not commit adultery, also said, You shall not kill. Now if you do not commit adultery, but kill, you have become a transgressor of the law, James 2:10, 11. And in that context, James was talking to people who discriminate against others. Bigotry, he meant them to understand, is as bad as adultery and murder.
Even righteous men in the Old Testament understood that the Law could not save them. As sinners, they counted on the grace of God. David wrote a Psalm about it, the fourteenth. Jehovah looked down from heaven upon the children of men to see if there were any who did understand. They were all gone aside; they are together become filthy; there is none that does good, no, not one, v2,3. We are all in the same boat—none of us deserve salvation.
But Christ came to offer us a salvation that would fit all of us, too, no matter how many times we have sinned, no matter the heinousness of our sins, as men would categorize them. Christ does indeed fit all, and not only that, His one size is available to all as well, no matter who we are or what our stations in life. All we have to do is put it on. The grace of God will always be a perfect fit.
For the love of Christ constrains us because we thus judge that one died for all, therefore all died; and he died for all that they that live should no longer live unto themselves, but unto him who for their sakes died and rose again, 2 Cor 5:14,15.