Leaning on the doorbell means exactly what it says, leaned up against it, causing the doorbell to ring continuously.
Knocking, on the other hand, is a brief, and often more quiet way of announcing your presence at the door. The quote uses these different methods to show a relationship between the two.
Opportunity is usually seen as fleeting, a once-in-a-lifetime event. Temptation, on the other hand, is usually seen as pervasive and always there.
Temptations are everywhere. In life, temptations are put in front of us to challenge our loyalty and respect.
I believe that opportunity is always present. It may not always be at the door, but it is usually within short distance, or at worst, down at the corner.
What we have to do is work to take advantage of opportunities, both the obvious ones, and those which are not quite so obvious.
Similarly, temptation is no more or less prevalent than opportunity.
It is just that opportunity looks like hard work and temptation looks more like fun. It is just a matter of perspective.
The real challenge is to take advantage of the opportunities more often than we take advantage of the temptations. That may be a little more difficult.
I believe that with some effort, and some thought, we can learn to do a good job at not only seeing opportunity, but acting on the opportunities which are of interest. Similarly, I believe we can find ways to see fewer temptations, and to act less frequently on our urges.
There are plenty of ways to reduce and even defeat temptation. Being in the company of good friends who will nudge and advice you away from temptations, support groups, self-help books.
On the other hand, there are plenty of opportunities. But can you hear them knocking? Will you get up and answer the door? Will you check the front yard and all the way to the next corner?
Nothing is more expensive than a missed opportunity, but I believe even more expensive is maximizing temptation that is disguised as an opportunity.
Don’t give up what you most want in life for something you think you want now.
Strive to do what is right, not what is easy.