Mortgage still valid, legal even if given to secure future advancements or loans

It is well settled that mortgages given to secure future advancements or loans are valid and legal contracts, and that the amounts named as consideration in said contracts do not limit the amount for which the mortgage may stand as security if from the four corners of the instrument the intent to secure future and other indebtedness can be gathered. [G.R. No. 121158. December 5, 1996]