He (Prabhupada) explained that the real problem is that people are not following Krishna’s instructions properly. If one practically surrenders to Krishna, He makes everything successful.
“Practical”, he (Prabhupada) said, “means it will be done by Krishna. Your only business is to surrender to Krishna. You cannot do anything. And as soon as you think, ‘I shall be able to do it,’ then you are a rascal. Immediately you are rascal.”
“So only a fully surrendered soul can do everything perfectly?” Harikesa asked.
Prabhupada answered, “He cannot do anything. Everything is to be done by Krishna. But he has to apply his intelligence by Krishna consciousness. Even if he is intelligent, he cannot do anything.”
Harikesa added, “Except surrender.”
“Yes. He can surrender, and Krishna will do everything. You have to act very sincerely under the direction of Krishna, and then the war will be successful, as Arjuna did.”
- A Transcendental Diary (Vol 1,Ch 2, Pg 44) by Hari Sauri Dasa