My sister sent me this for baby clothes, so the knot wouldn't rub against their skin. See if it makes sense.
1. I insert the needle down into and up through the fabric again in a very small beginning stitch.
2. Then, I pull the thread up through the fabric, just enough to clear the shorter tail.
3. At that point, I have two ends of thread on the 'top', or right side, of my fabric.
4. I then unthread the needle, match the two ends of the threads together, and re-thread my needle with my (now two) threads as I normally would, leaving a shorter tail, again, of thread- this time, two shorter matched ends, just like usual. At this point, I have one stitch-one thread thick, through my fabr ic, and two threads in my needle.
5. I simply take another tiny stitch at the beginning of the work, and the thread is now secured into the fabric without any knots at all!