2 Bible Verses about Goal Setting

"Which of you, desiring to build a tower, does not sit down first and calculate the cost, asking if he has the means to finish it? -- lest perhaps, when he has laid the foundation and is unable to finish, all who see it shall begin to jeer at him, saying, 'This man began to build, but could not finish.'read more.
Or what king, marching to encounter another king in war, does not first sit down and deliberate whether he is able with ten thousand men to meet the one who is advancing against him with twenty thousand?

Instead of that you ought to say, "If it is the Lord's will, we shall live and do this or that." But, as the case stands, it is in mere self-confidence that you boast: all such boasting is evil.