"教师不仅要培养观察自然现象的能力，还要培养观察自然现象的欲望。教师必须理解并感受到自己作为观察者的角色：活动应在现象中进行。"

Simplified Meaning:

A teacher should not only know how to watch and understand what's happening in the world but also want to do it. They should see themselves as someone who watches and learns from the natural events taking place around them. For example, a science teacher could take students outside to observe how plants grow instead of just reading about it in books. By doing this, the teacher notices and learns from the small details of nature, which can make teaching more interesting and real for the students. Teachers can apply this by being curious and paying attention to their surroundings, encouraging students to explore and discover new things for themselves. This approach helps students learn better because they see the real world in action, not just words on a page.