2 Timothy 1: 7 (NIV)
"For the Spirit God gave us does not make us timid, but gives us power, love and self-discipline."
When we became Christians, we became new in Christ and at one with Christ. Though we may not have physically felt so, we received power in order to speak life over our challenges and situations, power to overcome and power to walk along the path God had laid for us. In our weakness Christ makes us strong. The fact we may not feel particularly strong or resilient does not mean we have no power, it simply means we have not fully understood the fullness of God's word and are not yet walking in all He has called us to.