Has any woman ever had a child without experiencing the pain of delivery? No. But women, being so much in love with having children, do not give such importance to their own suffering. They do not run away from the pain of delivering a child. In the same way, in order to attain self-realization, the devotee is always ready to suffer.
Suffering that arises from devotion is not suffering, it is tapasya (austerity).
Devotion is fearlessness, devotion is suffering. If you are afraid of suffering, forget about devotion.