What has Christ 'made known to us' in John 15:15?

[druNkenBerZerKer]

I no longer call you servants, because a servant does not know his master's business. Instead, I have called you friends, for everything that I learned from my Father I have made known to you. John 15:15

what 'business of God' is Christ referring to?

 

[goodluckwithhat]

The Father's love for us.