natural endowment; innate talent
A somewhat literary set phrase meaning a gift or talent one is born with, often used in formal or written contexts.
His musical talent is truly a natural endowment.
A Sino-Japanese compound: 天 (heaven) + 与 (give) + の (possessive particle) + 資 (resources, talent). The exact historical derivation is uncertain, but the phrase has been used in literary Japanese to refer to innate gifts.