I wonder if you've ever looked back on a year of your life and felt ashamed: of the things done or not done, said or unsaid, thought or not thought... We may remember the opportunities we had for telling our friends about Jesus that we let pass us by; the guilt from remembering how we turned our back on God's perfect way and how we did our own thing; how we trusted in ourselves and worthless things, instead of trusting in God, who is the only thing worthy of our praise.
Basically, (to sum up the paragraph above) we feel rubbish about ourselves - wracked in guilt and despair. Maybe you can't fathom how God could ever love you and want you in his family. Compared to the other Christians you've come across, who seem squeaky clean and sickeningly perfect, you despair at how they seem to 'do it' and conclude that you will never be like that.
Well stop it. Seriously. Check out Romans 3vv 10-18
'as it is written: "None is righteous, no, not one; no one understands; no one seeks for God. All have turned aside; together they have become worthless; no one does good, not even one." "Their throat is an open grave; they use their tongues to deceive." "The venom of asps is under their lips." "Their mouth is full of curses and bitterness." "Their feet are swift to shed blood; in their paths are ruin and misery, and the way of peace they have not known." "There is no fear of God before their eyes."'
If you think about being unrighteous in terms of rubbishness, we , both believers and non-believers, are equally as rubbish as each other. No one is more rubbish or less rubbish than one another - we have all messed up, put God's rightful crown on our own heads and have decided to rule our own lives.
So the next time someone comments or you dwell on the possibility of someone being a 'rubbish Christian', think again:
A Christian is someone who realises that without Jesus they will always have and be rubbish. Only our bin man can take away our sin, that we can never ever get rid of by ourselves.