My Master, open my lips, and my mouth will declare Your praise.1Rabbi Yonasan Eibschitz in his sefer, Yaaros Devash, explains that upon reflecting in Whose Presence he is about to pray, man should be so overwhelmed with awe and trepidation that he is unable to open his lips. He therefore prefaces his prayer by beseeching Hashem, to open his lips, asking His help to be able to pray in His Presence.
אֲדֹנָי, שְׂפָתַי תִּפְתָּח וּפִי יַגִּיד תְּהִלָּתֶֽךָ:
My Master, open my lips, and my mouth will declare Your praise.1Rabbi Yonasan Eibschitz in his sefer, Yaaros Devash, explains that upon reflecting in Whose Presence he is about to pray, man should be so overwhelmed with awe and trepidation that he is unable to open his lips. He therefore prefaces his prayer by beseeching Hashem, to open his lips, asking His help to be able to pray in His Presence.