Nouman Ali Khan gives a beautiful lecture on the power of Dua and how it is the weapon of the believer. Dua is the means that one uses to achieve the desired goals that one has.
And your Lord says, “Call upon Me; I will respond to you.”
[Surah Al Hud, verse 60]
When we turn to Allah in humility and submissiveness and advocating complete Tawakkul in Him by making Dua to him in continuity, we invoke the pleasure of Allah. No matter how difficult the road ahead is and no matter the number of challenges, the solution lies within us which is to call onto Allah and hope in complete positivity that Allah will surely answer our prayers.