We can understand that although the Lord does not personally experience distress, He experiences that distress which is in the heart of His devotees. His devotees are so dear to Him that He knows everything that is going in their hearts. Therefore, when the devotees feel distress for others' suffering, the Lord feels it. Such is the power of the devotees' love. They can invoke the Lord's mercy. This is vaishnava. He is para-dukha-dukhi.
June 26, 2005, Moscow