Jesus makes you spiritually strong by His Spirit through difficulties and weakness.

“This is the word of the LORD to Zerubbabel: Not by might [chayil] nor by power [koach], but by My Spirit, says the LORD of hosts.” (Zech 4:6)
“And He said to me, My grace is sufficient for you, for My strength is made perfect in weakness. Therefore most gladly I will rather boast in my infirmities, that the power of Christ may rest [episkenoo] upon me.” (2Cor 12:9)
“But may the God of all grace, who called us to His eternal [aionios] glory by Christ Jesus, after you have suffered a while, perfect, establish, strengthen, and settle you.” (1Pet 5:10)
“But you, be strong and do not let your hands be weak, for your work shall be rewarded!” (2Chr 15:7)
“Let the weak say, I am strong.” (Joel 3:10)
“Therefore I take pleasure in infirmities, in reproaches, in needs, in persecutions, in distresses, for Christ’s sake. For when I am weak, then I am strong.” (2Cor 12:10)
“Both riches and honor come from You, and You reign over all. In Your hand is power and might; in Your hand it is to make great and to give strength to all.” (1Chr 29:12)
“O LORD God of our fathers, are You not God in heaven, and do You not rule over all the kingdoms of the nations, and in Your hand is there not power and might, so that no one is able to withstand You?” (2Chr 20:6)
“Nevertheless He saved them for His name’s sake, that He might make His mighty power known.” (Ps 106:8)
“He gives power to the weak, and to those who have no might He increases strength.” (Isa 40:29)
“But truly I am full of power by the Spirit of the LORD, and of justice and might” (Mic 3:8)
“Finally, my brethren, be strong in the Lord and in the power of His might.” (Eph 6:10)
“strengthened with all might, according to His glorious power, for all patience and longsuffering with joy” (Col 1:11)
“Amen! Blessing and glory and wisdom, thanksgiving and honor and power and might, be to our God forever and ever.” (Rev 7:12)
Reading: Zech 2-4; Heb 3