Complex sentence: It is also said that the sword will not break unless its owner breaks first, strongly implying that as long as the wielder remains strong in the face of adversity, staying resolute and not breaking either in fear or principle, the weapon will never break.
Split into simpler sentences: It is also said that the sword will not break unless its owner breaks first. Strongly implying that as long as the wielder remains strong in the face of adversity, staying resolute and not breaking either in fear or principle, the weapon will never break.