Not until we have become humble and teachable, standing in awe of God's holiness and sovereignty. acknowledging our own littleness, distrusting our own thoughts, and willing to have our minds turned upside down, can divine wisdom become ours.
The people of the Lord in humility are to lay themselves and their prayers, and all that they have, at the foot of their God, to be disposed of by him as he in his heavenly wisdom seeth best. Yet not doubting but God will answer the desire of his people that way that shall be most for their advantage and his glory. When the saints therefore do pray with submission to the will of God, it doth not argue that they are to doubt or question God's love and kindness to them. But because they at all times are not so wise, but that sometimes Satan may get that advantage of them, as to tempt them to pray for that which, if they had it, would neither prove to God's glory nor his people's good.
The surest way to know our gold is to look upon it and examine it in God's furnace, where he tries it that we may see what it is. If we have a mind to know whether a building stands strong or no, we must look upon it when the wind blows. If we would know whether a staff be strong, or a rotten, broken reed, we must observe it when it is leaned on and weight is borne upon it. If we would weigh ourselves justly we must weigh ourselves in God's scales that he makes use of to weigh us.