Can we know everything by God? If so, what is the way to achieve this?

The bible says,if ye lack wisdom ask of God, and it does not mean God will tell you everything, example,God gave me a gift in early 2000’s,He gave me three of them:the Spirit of wisdom, knowledge, and discernment,all at one time,He told me to tell the lady I was taking care of to not get operated on,at this time She had bone cancer,I had to leave the job, before I left I told Her what the Holy Spirit said,years later,She decided to get operated on,She died right their on the operating table.