The principle of progressive overload is an important part of long-term success in strength training. Essentially, the principle states that as you get stronger, you will gradually need to increase the volume and/or intensity of your training to continue making progress. A lot of beginners confuse this with the idea that the only way to make progress is to add weight to the bar (increasing intensity) each week or each workout. However, adopting this mindset can lead to a lot of frustration when your training progress inevitably slows down. In my experience, it's more productive to think about this principle as: 'because I've gotten stronger, I'm able to add more weight to the bar'. I believe this mindset helps to take some of the pressure away from training and facilitates an easier transition from the beginner to intermediate phases of training.