Our spiritual life is like a bank account. If you do only withdrawals without deposits the money will soon be all gone leaving you with zero balance.
Same with us, if all we do is sharing without refilling we will soon run on zero balance, our words will lack the essence of the Holy Spirit and make no impact on those who listen to us.
We need to keep in prayer, reading and studying the word of God,fasting and meditating on what we read so we won't turn into empty vessels.