Seedless watermelons have been engineered so that you don’t have to spit. You can devour sweet, wet, red fruit without the hassle of separating out the seeds. Scientists have also genetically engineered seedless grapes, bananas, oranges, lemons, tomatoes. They are a contradiction in terms because fruit is defined by the seeds they carry.
So too, the Christian is defined by the seed s/he carries, seeds of evangelism, seeds of change, seeds of revolution. A seedless Christian is one who remains continually unmotivated to do much for Christ. He is inwardly focused, self-centered and immature.
Seedless fruits were altered to make the fruit more palatable to the eater. If you are a seedless Christian, you are more palatable — to the devil.
The good news is, of course, that we can pray to become full of seeds. We can begin to aim our lives in a new direction and do the things which Christ has called us to do. A Christian, by definition, saves others from their sins also.