A Saint is a sinner who realises God’s love for them. I.e. God’s love becomes a reality for them and in them. It is made real in them. His love is their reality.
We are all loved by God, however bad we are, however religious we are, however successful we are, and even however “holy” we are. The only difference in the Saints, is that they realise how loved, how truly holy, every one of us is. They are enlightened by the truth of the gospel, and made radiant by that same truth living in them.
A Saint is not good in or of themselves. Their only goodness is the free love of God, moving through them like the wind. They hold no goodness of their own, but let His good gifts come via them. They are immersed in living waters, never stagnant.
The Saint is a sinner who is simply who they are. They are no one else and nothing more. They are this fully, because they are loved as this and loved into this, and so are this in perfect freedom.
The Saint is a sinner who stops trying. Stops trying to impress, to make their own way through life, to earn happiness or love. Even stops trying to achieve salvation. They abandon all this, because they know their Father will provide everything.
A Saint is a sinner who never stops trying. They never stop trying to please God, because they know His love, and know that He will give them the victory. They have no care to earn heaven, and for this very reason, have every desire to express it.
Ladies and gentlemen, stop wasting your lives and abandon yourselves completely to His merciful love! Are you unworthy? Are you too sinful? He died on a cross for love of you in your entirety, sin and all! Nothing is greater than His love for you. Nothing in heaven or on earth or under the earth can keep you from His love for you. What are you waiting for?!

(you don’t have to look this cool to be a Saint, but it doesn’t hurt either ;)
God bless you