PURPORT

The Supreme Personality of Godhead is already in the core of everyone's heart. Isvarah sarva-bhutanam hrd-dese 'rjuna tisthati (Bg. 18.61). Logically, therefore, it was not at all difficult for Lord Visnu to enter Hiranyakasipu's body. The word vivigna-cetah, "very anxious," is significant. It is not that Lord Visnu was afraid of Hiranyakasipu; rather, because of compassion, Lord Visnu was in anxiety about how to act for his welfare.