It may seem crazy, but the best investment a Christian can make by far is to give of time, talent, and treasure to the Lord. To be a giver reflects the heart of Christ. Where your treasure is, there your heart is. Have you made a conscious decision to give to the Lord?
After Jesus' resurrection, He was on earth for almost six weeks. He taught of His kingdom and told followers to stay in Jerusalem till the Holy Spirit came. Then He ascended up into the clouds, out of their sight. Is this important? Yes! What does the ascension teach us?