Is it Islamically permissible to use Quranic verses in speech, to cite them as proverbs, or to comment with them on pictures on social media?

Writing Quranic verses on pictures is permissible if the purpose is Islamically praiseworthy, such as reminding people or demonstrating Allah's greatness. However, if the intention is frivolity, or if the picture is forbidden or aesthetically displeasing, then it is not permissible.