Gathered together on this page are inspiring prayers to help with fostering self-assurance and inner courage, with an uplifting prayer for self-confidence and beautiful prayer for mental strength. There is also a prayer video for drawing close to Christ, based on the famous prayer of St Richard ("Day by Day"), and a short prayer for encouragement and guidance.
(a prayer for inner confidence from www.lords-prayer-words.com)
(a short prayer of encouragement from www.lords-prayer-words.com)
O God of peace, who hast taught us that in returning and rest we shall be saved, in quietness and in confidence shall be our strength: By the might of thy Spirit lift us, we pray thee, to thy presence, where we may be still and know that thou art God; through Jesus Christ our Lord. Amen.
(source: Book of Common Prayer, 1979 version, Protestant Episcopal Church in the USA.)