Well stated. I agree completely. The best way I think to invest is as follows:

Buy 1/3 of the amount you want at a time, unless the price is exceptionally low and you get real lucky.

This gives you price movements to the plus and minus. If the price drops then buy another 1/3. Set limits to make sure your in at the price you wanted. You'll miss by a bit more but that's cool.

The final 1/3 comes at your discretion. If you don't feel good about getting in at 100% stick with 66.6% and hold the other 33.3% in cash.

Don't let the market scare you off.