To save a life is to save that entire world. To destroy a life is to destroy an entire world. To help others live is a corollary of this principle. Every human being that G-d has created is obliged to provide for others in need. I will respect the institution of marriage.
Marriage is a most divine act.
The marriage of a man and a woman is a reflection of the Oneness of G-d and His creation. Dishonesty in marriage is an assault on that Oneness. I will not take that which does not rightfully belong to me. Deal honestly in all your business. By relying on G-d, rather than on our own conniving, we express our trust in Him as the Provider of Life.