No Christian knows what tomorrow will bring. Christians must be accountable to God every minute, every hour, every day. The Bible teaches that today is the day of salvation and holy living. Don't wait for tomorrow. Christians are to live according to the will of God in the present tense for this very reason. Never should salvation be taken lightly or for granted enough to miss the mark today. Life is only vapor and then it vanishes away. Reasons are many to stay in harmony with Christ who saved you and redeemed your soul with an His amazing Grace. Boasting is a sin. High-mindedness is dangerous. Be careful how you behave. You're accountable. Do good because the heart is cleansed by Christ who bought you for a price. The Bible teaches life is a vapor and lasts for a little while and then its gone. I like what James had to say about this.
James 4:14-17...Whereas ye know not what shall be on the morrow. For what is your life? It is even a vapour, that appeareth for a little time, and then vanisheth away. For that ye ought to say, If the Lord will, we shall live, and do this, or that. But now ye rejoice in your boastings: all such rejoicing is evil. Therefore to him that knoweth to do good, and doeth it not, to him it is sin.