The Latin phrase ecclesia supplet means the Church supplies. The Church supplies the Christian with the means of embracing God. When one embraces tradition one embraces Christ through what the Church supplies. When, for instance, a Christian makes the sign of the cross, they embrace their prayer through what the Church supplies. When a Christian prays his daily office he embraces God through what the Church supplies. In fact, if you really think about it, even when a Christian embraces a simple Bible reading they embrace what the Church supplies!
If one thinks that they can get to heaven without the ecclesia supplet then let him not read the Bible, nor do anything that the Church has supplied. This would leave the person in the hands of Satan’s realm where Satan is ready and willing to devour them.
Next time you use the sign of the cross, the Bible, or anything that gives you access to Christ outside the gathering of the saints yet still through what the Church supplies, remember that this is a divine avenue!
BTW, the picture above is my desktop pic!