יָדוּעַ וּמְקוּבָּל בְּעִנְיַן הַכַּוָּנוֹת שֶׁבִּתְפִלָּה

There is a well-known tradition

אֲשֶׁר אֵלּוּ שֶׁאֵין דַּעְתָּם יָפָה לְכַוֵּן

concerning individuals who do not have the mental ability to concentrate on the kavanos, the mystical concepts to be meditated upon in the course of the prayers,

מִפְּנֵי הֶעְדֵּר הַיְדִיעָה אוֹ מִפְּנֵי שֶׁאֵין בְּכֹחָם לִזְכּוֹר כַּוָּנוֹת הַפְּרָטִיּוֹת בְּעֵת הַתְּפִלָּה

either because they are not familiar with them, or because they cannot recall the specific concepts at the appropriate points in the course of the prayers:

מַסְפִּיק שֶׁיְּכַוְּנוּ כַּוָּנָה כְּלָלִית

It is sufficient that they have in mind a comprehensive kavanah —

לִהְיוֹת תְּפִלָּתוֹ נִשְׁמַעַת לְפָנָיו יִתְבָּרֵךְ עִם כָּל הַכַּוָּנוֹת הַמְבוֹאָרוֹת בְּסִפְרֵי קַבָּלָה.

that their prayers should be heard by G‑d as if [they were recited] with all the kavanos that are set out in the Kabbalistic texts.

Text and Translation courtesy of Sichos in English