"I will price him till i am gone thank you jesus and god".
1818, as a term in church administration, "the holding by one person of two or more offices at the same time," from plural + -ism. Attested from 1882 as a term in philosophy for a theory which recognizes more than one ultimate principle.
You develop mature relationships with other by being trustful and respectful to the other person. Don't be jealous to what they have. Don't hold grudges on them. You should also give them privacy.