Reverential capitalization is the practice of capitalizing religious words that refer to deities or divine beings in cases where the words would not otherwise have been capitalized. Pronouns are also particularly included in reverential capitalization:
and God calleth to the light 'Day,' and to the darkness He hath called 'Night;' and there is an evening, and there is a morning — day one.
— Genesis 1:5, Young's Literal Translation (1862)
In this example, the proper name "God", like "Day" and "Night", is capitalized and the pronoun "He" is a reverential capitalization. While proper names are capitalized universally, reverence for any particular divinity is not universal. In short, when pronouns that are usually lowercase are capitalized, this usually implies that the author personally reveres and regards as a deity the antecedent of that pronoun.
Nouns which are used as titles for a deity may also be capitalized. Examples include "the Lord", "the Father" and "the Creator".