Both

Master, which is the great commandment in the law? Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the first and great commandment. And the second is like unto it, Thou shalt love thy neighbour as thyself. (Matthew 22:36-39 KJV)

John Dixon, in his great book entitled, The Best Kept Secret of Christian Mission, makes the following thought provoking comment about that scripture:

According to Jesus, our fundamental obligation in life is to love both God and neighbor. Most of us would rightly criticize people who claim to love God but ignore their fellow human beings. On Jesus' teaching, the reverse would be just as open to criticism. Treating people well while ignoring the Creator falls way short of what Jesus taught was our obligation. Jesus left no room either for the religious hypocrite who Ioves God but not neighbor or for the moral agnostic who cares for people but does not revere God himself.

A prayer for the day - Lord, help me today to be obedient to both commandments, neglecting neither neighbor, nor God.