Hisbodidus is the only way to succeed
Daily persistence even just for the preparation or one utterance All the tzadikim and the G-d fearing, didn’t come to their level except through hisbodidus and conversation between oneself and his Creator, as is explained earlier. And specifically in these generations, at the end of the exile, when the yetzer hura (-evil inclination) and the other side (-evil realm) have very extremely intensified, and the generation is very weak, body and soul, it is impossible to be saved now from the onslaught and from the abundant impediments and to draw close to Hashem Yisburach, except through conversing between oneself and his Creator, that one should accustom himself to set a designated hour every day to express his words before Hashem Yisburach in his native tongue specifically. And everything that is with (-on) his heart he should converse before Hashem Yisburach, be it to ask for pardon and forgiveness on the past, be it to entreat for the future that Hashem Yisburach should save him from what he needs to be saved from, and he should merit to draw close to Him blessed He. And even if he is unable to speak and to express his words, even still, even if he won’t speak just one word, this is also very good. And even if he says just, “Master of the World,” this is also very good. And even the preparation itself, what he prepares himself and desires to speak, even though he is unable to speak, even still the preparation and the desire itself is very precious in the eyes of Hashem Yisburach. And if he will be strong at this, to force himself every time to speak before Hashem Yisburach what is with (-on) his heart, certainly in the course of time Hashem Yisburach will help him so that he will be able to express his words well, and he can merit to speak new (-novel) precious words that they will bestow him with from the heavens, and he will merit to come to all the goodness, truth, and eternal, through this practice, which includes all the aitzoas (-advice, remedies) for serving Hashem Yisburach. Because all the aitzoas need copious prayer and entreaty, fortunate is the person who strengthens himself in this. Because from (one) small (in stature) to (one) big (in stature), it is impossible to be a kosher person except through hisbodidus and conversing between oneself and his Creator.
(Likutay Moharan II, 25, 96, 100, Outpouring of the Soul, Introduction, article 2, 4, 8, 47)