"After Kṛṣṇa had just learned to walk, He was going in and out of the house very frequently. Yaśodā became surprised and said, "This child is too restless and cannot be controlled! He is incessantly going about the neighborhood of Gokula [Vṛndāvana], and then He is coming back inside the house. I see that the child is very fearless, but in spite of His fearlessness, I am becoming more and more afraid of His falling into some danger."
This again is an instance of the conjunction of two opposing elements: the child was very fearless, but at the same time Yaśodā was becoming fearful of some danger. Here danger is the cause, and Yaśodā's feelings are in conjunction of two opposing symptoms. In other words, Yaśodā was feeling both happiness and doubt, or growing fear."
Srila Prabhupada nod/31