And so this collocation of ideas opens the way for us to important considerations bearing upon the practical ordering of our natures and of our lives. For instance, there is no stability and settled persistency of righteous purpose possible for us, unless we are made strong because we lay hold on God's strength, and stand firm because we are rooted in Him. Without that hold-fast, we shall be swept away by storms of calamity or by gusts of passion. Without that to steady us, our own boiling lusts and desires will make every fibre of our being quiver and tremble. Without that armour, there will not be solidity enough in our character to bear without breaking the steady pressure of the world's weight, still less the fierce hammering of special temptation. To stand erect, and in that sense to have a right spirit--one that is upright and unbent--we must have sure footing in God, and have His energy infused into our shrinking limbs. If we are to be stable amidst earthquakes and storms, we must be built on the rock, and build rock-like upon it. Build thy strength upon God. Let His Holy Spirit be the foundation of thy life, and then thy tremulous and vagrant soul will be braced and fixed. The building will become like the foundation, and will grow into 'a tower of strength that stands four-square to every wind.' Rooted in God, thou shalt be unmoved by 'the loud winds when they call'; or if still the tremulous leaves are huddled together before the blast, and the swaying branches creak and groan, the bole will stand firm and the gnarled roots will not part from their anchorage, though the storm-giant drag at them with a hundred hands. The spirit of holiness will be a firm spirit.