To fashion the heart, fold the cord over itself to create a small loop.
Take the right working cord end down through the loop, as shown.
Bring the working end back to go upwards through the upper loop and then down through the lower loop, as shown.
Take the working cord down through the bottom loop (marked with number1). Next, thread the end up through the center loop (marked with number2) and back down through the top loop (marked with number3)
Now shape the knot into a more defined heart by gently pinching the bottom into a V you'll make your celtic heart knot at last.