A "contract of life insurance" is one whereby the insurer, for a consideration, assumes an obligation to be performed upon the death of the insured or upon the death of another in the continuance of whose life the insured has an insurable interest, whether such obligation is one to pay a sum of money, to perform services, or to furnish goods, wares, or merchandise, or other things of value, and whether the cost or value of the undertaking on the part of the insurer is more or less than the consideration flowing to him.