Use "sharp-sighted" in a sentence

1. sharp-sighted guard of the animal nature lives in your body as an integral part

2. It would be a vain thing of me to deny, that, at the beginning of my career, I was misled by the wily examples of the past times, who thought that, in taking on them to serve the community, they had a privilege to see that they were full-handed for what benefit they might do the public; but as I gathered experience, and saw the rising of the sharp-sighted spirit that is now abroad among the affairs of men, I clearly discerned that it would be more for the advantage of me and mine to act with a conformity thereto, than to seek, by any similar wiles or devices, an immediate and sicker advantage

3. With the many insects which imitate various objects, there is no improbability in the belief that an accidental resemblance to some common object was in each case the foundation for the work of natural selection, since perfected through the occasional preservation of slight variations which made the resemblance at all closer; and this will have been carried on as long as the insect continued to vary, and as long as a more and more perfect resemblance led to its escape from sharp-sighted enemies

4. though I am pretty sharp-sighted too